Does Pure of Voice occur before or after Save Yourselves?

The Guardian skill Save Yourselves is a shout which (among other things) transfers conditions from allies onto yourself.

The Guardian trait Pure of Voice causes all allies who are affected by a shout to convert a condition into a boon.

Let's say a Guardian is surrounded by five allies, each with one condition, and the Guardian uses Save Yourselves. Does each ally have their condition turned into a boon, or do all of the conditions get transferred to the Guardian and turn into only one boon?